He is older than I.
He is four years older than I.
He is not as/so young as I .
以上三句都对,也可以用下面的表达法
I am younger than he.
I am four years younger than he.
I am not as/so old as he.
He is older than I.
He is four years older than I.
He is not as/so young as I .
以上三句都对,也可以用下面的表达法
I am younger than he.
I am four years younger than he.
I am not as/so old as he.